2017 TRD sport DCLB automatic transmission, Had my dealer do a transmission fluid check, they said it was over filled and technician corrected the level. Has anyone heard of them being over filled? Truck was dropped off at the dealer by the wife at 10am, they called at 1:30pm same day and said it's ready... I don't think it was properly checked.

There was a post here were the dealer told the OP they would suck out all the fluid to get the most accurate measurement its ridiculous!
And there have been countless postings of one dealer saying it needs mo' and some saying it need less.
Do you really want someone checking the ATF level on your truck?? I mean we trust that the wheel bearing, center propeller shaft bearing are ok, and they generally last 100k without ever being touched,. It's daunting to think the ATF would be low.
It's sealed for a reason, and for the long run, and we haven't seen any issues with these going back to the 2nd Gen. They're just not failing due for the lack of ATF.
If a transmission fails, is usually a part failure or miss assembly and not for the lack of ATF.

Having said that the process of a manual check is actually very simple, almost like checking with dipstick where the temp has to be in range, and yet many screwed them all up, and that's why they sealed them.

I'm not about to let anyone near my ATF as long as there are no leaks and it works as intended, but that's just me.

Well how would you tell what temperature the fluid is at? To do a hot check I was under the impression Toyota uses the transmission fluid check kit that they had developed, involving a air vaccume, fluid pump, drain plug probe and regulators.

Manuals are full when the fluid reaches the fill port and starts to drip out...overfilling a manual trans doesn't make sense unless they filled it through the top by removing the shifter in the cab. Maybe that's how it's done in the factory but usually when you get a fluid change its done via the fill port.

Well how would you tell what temperature the fluid is at? To do a hot check I was under the impression Toyota uses the transmission fluid check kit that they had developed, involving a air vaccume, fluid pump, drain plug probe and regulators.

Click to expand...

you ask the ecu how hot it is, using the special procedures outlined in the toyota document that tell
how to check and adjust fluid in the trannies

it is not a mystery, it just takes detailed and specific setup steps and time. then open the hole and see if it drips or not

Manuals are full when the fluid reaches the fill port and starts to drip out...overfilling a manual trans doesn't make sense unless they filled it through the top by removing the shifter in the cab. Maybe that's how it's done in the factory but usually when you get a fluid change its done via the fill port.

Click to expand...

I was thinking the same thing. OP originally said "Had my dealer do a manual transmission fluid check" then three post down said it was an automatic, so a little confusing.
I only put oil in my manual transmissions, not fluid, and all of the ones I have owned were fill to they drip out the fill hole.

I think the confusion on the posting and questions is the difference between a "manual transmission" fluid check and a "manual" transmission fluid check. Simple lack of punctuation causes all sorts of confusion.

I think the confusion on the posting and questions is the difference between a "manual transmission" fluid check and a "manual" transmission fluid check. Simple lack of punctuation causes all sorts of confusion.

Click to expand...

Yep. Agree! Wondering how you would do an "automatic" check of the transmission fluid?

I think the confusion on the posting and questions is the difference between a "manual transmission" fluid check and a "manual" transmission fluid check. Simple lack of punctuation causes all sorts of confusion.

Click to expand...

ohhhh, haha. Yeah, I read it as a manual transmission not an automatic. My bad, carry on....